Coupling device for flexible tubing



No. 624,477. Patented May 9, |899. L. VON G HAVE. CUPLING DEVICE FR FLEXIBLE TUBING. (Application led Jan. 11, 1899.)

(No Model.) I

THE Nonnls PETERS co. PHoTc-Llwo., wnsnwnmn. u. c.

'III

UNITEDA STATES PATENT OFFICE.

LOTHAR VON GRAVE, OF WALLINGFORD, CONNECTICUT, ASSIGNOR OF ONE- THIRD TO GEORGE C. WALDO, OF MOUNT VERNON, NEWT YORK.-

COUPLING DEVICE FOR FLEXIBL TUBING.

SPECIFIGATON forming part of Letters Patent No.` 624,477, dated. May 9, 1899. Appncatin ined January 11, 1899. YSerin No. 701,799. (No modem To all whom t may concern.;

Be it known that I, LOTHAR VON GRAVE, a subject of the King of Prussia, Emperor of Germany, residing at Tallingford,New Haenable said parts to be grasped and turned or otherwise operated, so as to draw them toward or move them away from each other.

In operation the part B is slipped onto one ven county, Connecticut, have invented certain new and useful Improvements in Coupling Devices for Flexible Tubing, of which the following is a full,.clear, and eXact description.

My invention relates to an improved coupling for flexible tubing; an'd among the chief objects are the provision of a simple, inexpensive, and efective means whereby two ends of iexible tubing, such as hose and the like, may be quickly, easily, and effectively connected.

Figure l is a side elevation of my invention as it appears in operation. Fig. 2 is a longitudinal section of the parts shown in Fig. l. Fig. 3 is an end view of the interchangeable independent compression-rings. Fig. 4 is an end view of the internal tubular member. Fig. 5 is a side view of the same.

5 A A are ends of iiexible tubing, shown as abutting each other or brought into close proximitywithinaframe-section B B, which, if desirable, may be made in tubular form.

C is an internal rigid tube, which tube is of not substantially greater length than the length of the external frame. On the external surface of the tube C are a plurality of annular rings C C2.

D D are independently-movable compression-rings, preferably made interchangeable and held, respectively, within the parts of the frame-sections B B. The surfaces of these several rings D D, as well as therings C C2,'may be rounded, so as to present noncutting bearing-surfaces. O ne of the sections B B is preferably arranged with an external screw-thread, while the other part is arranged with an internal screw-thread corresponding therewith to enable the said casing members to be drawn together, or .other equivalent means may be provided. The exterior surfaces of the parts B B maybe knurled or otherwise shaped, so as to afford a holding to `and effective manner.

end A of the hose, while the part B' is slipped onto the other end A. Each end of the hose A A' is slipped onto the tube C and over the annular projections C C2 thereon, as shown 55 in Fig. 2. The parts B B of the external frame are then moved toward each other, and the screw connection or other equivalent means is then brought into play to draw the said parts toward each other. The parts B B 6o are drawn toward each other until the rings D D engage the hose or iiexible tubing between their bearing-surfaces and the bearingsurfaces of the rings C C2. By this means an elfective union is secured, and thus two bare ends of iiexible tubing or hose-pipe may be readily connected or coupled in a quick By this improved construction I am enabled to couple liexible tubing of various size. If, however, the tubing 7o is provided with a reinforce to prevent substantial lateral stretch, such as is frequently provided in fire-hose, the various sizes may l be coupled by means of substituting an internal tube C and bearing-rings D D' of an ap- 75 propriat-e size.

As shown in 4the drawings, the opposite ends of the internal tubular reinforce C are tapered or dared outwardly to give less resistance to the flow of the uid. By this 8o means :it will be seen that a very thin tube C may be provided, so that the internal diameter of the tube proper is not materially lesscned. The engagement of the hose is effected by the bearing between the annular in- 8 5 ternal rings D D C C2. The latter require no internal reinforce, the same being sufficiently strong of themselves to stand up under the pressure. Thus the tube C simply acts asan alinement-tube and separator for 9o the rings C C2, and in addition thereto it performs the function of a closure to prevent the escape of fluid.

What I claim is-- A coupling for flexible tubing comprising, two members thereof may be adjustably inlo a tube, a plurality of rings thereon of greater terlocked one with lthe other. 4diameter than said tube, movable rings lo- Signed at Wallingford, Connecticut, this cated outside of said Erst-named. rings and 6th day of January, 1899. 5 of less internal diameter than the external diameter of said irst-named rings, a two-part LOTHAR VON GRAVE' frame located exteriorly of said tube and car- ,l Vitnesses: rying said movable rings,and adjusting means RUDOLF WAGNER,

as a part of said frame-sections whereby the WILLIAM F. GEIGER. 

